The world's smallest ceramic NFC tags from 3×3mm — designed for jewelry traceability, smart rings, luxury anti-counterfeiting, and precision IoT. NTAG213/ICODE SLIX chips, ISO 14443A/15693, with or without adhesive, free samples from RFIDSU.
When your product design has just a few millimeters to work with, this 3mm NFC tag fills the gap. The 3.5mm Ceramic Micro NFC Tag starts at 3×3mm — one of the world's smallest NFC tags available — built from high-grade ceramic for permanent embedding inside jewelry, smart rings, precision instruments, and luxury goods where no other NFC tag can fit without being noticed.
Ceramic does what PVC and FPC cannot. The dense ceramic body resists heat, corrosion, and physical shock that destroy standard NFC stickers during manufacturing and daily use. The smooth, flat surface sits flush against metal settings, glass, and polished surfaces without gaps or bubbles. Whether embedded inside a diamond ring cavity or bonded to a surgical tool, these micro tags stay bonded and readable for the life of the product.
Available in 3×3mm and 3.5×3.5mm with NTAG213 and ICODE SLIX chip options, with or without 3M adhesive backing. Full pre-encoding support means your ceramic 3mm NFC tags arrive programmed and ready to embed — no on-site programming required.
Key Features
World's Smallest NFC Tag
Starts at 3×3mm — fits inside ring cavities, pendant settings, fingernail patches, and injection-molded components where no other NFC tag can go.
Ceramic Material Durability
Dense ceramic body resists corrosion, chemicals, and physical shock. Smooth and flat surface sits flush against metal settings, glass, and polished surfaces without gaps.
High-Temperature Resistance
Ceramic body withstands temperatures far beyond standard NFC tags. NFC chip operates up to 80°C; returns to normal read/write after cooling from higher exposure.
Multi-Chip Options
NTAG213 (ISO 14443A) for NFC smartphones or ICODE SLIX (ISO 15693) for industrial HF scanners. Both available in 3mm and 3.5mm sizes.
Pre-Encoding Service
Factory pre-encoding with URLs, serial numbers, and custom data. Arrive at your facility already programmed and ready to embed into your product.
With or Without Adhesive
Choose 3M adhesive backing for direct bonding to surfaces, or no-adhesive version for epoxy embedding and cavity fitting in OEM products.
Embed inside rings, pendants, and bracelets for brand authentication, product provenance, and resale verification. Invisible from the outside, scannable from any NFC phone.
Smart Rings & Wearables
At 3mm, these fit inside smart ring cavities and NFC wristbands where larger tags simply cannot be accommodated. Invisible, permanent, always ready to scan.
Luxury Goods Anti-Counterfeiting
Permanently embed inside watches, handbags, and high-end accessories. Verify authenticity at any point in the supply chain with a single tap.
Precision Instrument Management
Tag surgical tools, lab equipment, and precision components for maintenance logging and asset tracking in space-constrained environments.
Smart Nail Art
Ultra-thin ceramic micro tags embeddable under nail art layers for NFC-activated content, social sharing, and personal branding applications.
Small IoT Device Identification
Embedded digital identity for compact IoT sensors, industrial modules, and custom electronic devices requiring a permanent, scannable 3mm NFC tag.
Why Choose RFIDSU?
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Years in RFID Tag Manufacturing
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Countries Served
OEM
Full OEM/ODM Custom Service
Free
Samples Available on Request
RFIDSU is a specialized ceramic micro NFC tag manufacturer with 10 years of RFID industry experience. We hold proprietary technology for ultra-small NFC tag production starting from 3×3mm, providing stable production capacity and consistent quality for jewelry brands, wearable tech companies, and precision hardware manufacturers worldwide. Full OEM/ODM support with free samples.
Customization Options
From chip selection to adhesive option and pre-encoding, our ceramic micro NFC tags are built to your exact project specifications with full OEM/ODM support.
Chip Selection
NTAG213 for NFC smartphone interaction, ICODE SLIX for industrial HF scanners. We recommend the right chip based on your reader infrastructure.
Size Options
Standard 3×3mm and 3.5×3.5mm. Custom cavity-fit dimensions available for embedding into specific product housings, ring settings, and molds.
With or Without Adhesive
Choose 3M adhesive for direct surface bonding, or no-adhesive version for epoxy embedding and cavity fitting in jewelry settings and OEM products.
Pre-Encoding
Factory pre-encode 3mm NFC tags with URL links, serial numbers, TXT, and encryption. UID excel list provided for each order batch.
Surface Finish
Smooth, flat ceramic surface. No printing or laser marking available due to the ultra-small size — the clean ceramic finish is the standard presentation.
Packaging
Individual pieces or tape-and-reel format. Custom tray and bulk options available for ceramic micro NFC tag assembly workflows.
Frequently Asked Questions
What is the read range of these micro tags?
Due to their ultra-small 3mm antenna size, these tags require tap-to-read — place your phone or reader directly against the tag surface. The ceramic body and compact antenna design prioritize durability and fit over read distance. For most jewelry traceability and embedding applications, tap reading with a smartphone or handheld reader is standard practice.
Why use ceramic instead of PVC or FPC?
Ceramic offers superior heat resistance, chemical resistance, and structural durability compared to PVC or flexible substrates. For jewelry manufacturing processes including polishing, plating, and high-temperature treatments, ceramic ensures the 3mm NFC tag survives conditions that would destroy standard NFC stickers. The smooth, flat ceramic surface also adheres cleanly inside metal settings.
Which chip should I choose — NTAG213 or ICODE SLIX?
Choose NTAG213 if your customers will scan with NFC-enabled smartphones (iOS/Android). Choose ICODE SLIX if you use industrial HF readers in warehouse or manufacturing environments. Both support pre-encoding and UID tracking. Not sure? Contact us and we will recommend based on your use case.
Can these be embedded directly in metal jewelry settings?
Standard tags may experience signal reduction when placed directly adjacent to metal. For embedding inside metal rings, watch cases, and metallic housings, we recommend testing the specific configuration with your reader first. Contact us with your project details and we will advise on the best approach for your ceramic micro NFC tag application.
Can I get samples before placing a bulk order?
Yes. We provide free samples in both NTAG213 and ICODE SLIX variants, with or without adhesive backing. Contact us with your application details and we will ship samples with full technical specifications and encoding support.
Need the World's Smallest NFC Tag?
Get free samples of our 3mm ceramic micro NFC tags, request a custom quote, or ask our specialists about chip options, adhesive configurations, and jewelry embedding applications.
